Hall, R. R. A new definition of the density of an integer sequence. (English) Zbl 0393.10055 J. Aust. Math. Soc., Ser. A 26, 487-500 (1978). MSC: 11B83 11N37 11K06 PDFBibTeX XMLCite \textit{R. R. Hall}, J. Aust. Math. Soc., Ser. A 26, 487--500 (1978; Zbl 0393.10055)
Erdős, Paul; Hall, R. R. On some unconventional problems on the divisors of integers. (English) Zbl 0393.10047 J. Aust. Math. Soc., Ser. A 25, 479-485 (1978). Reviewer: G.Kolesnik MSC: 11N37 PDFBibTeX XMLCite \textit{P. Erdős} and \textit{R. R. Hall}, J. Aust. Math. Soc., Ser. A 25, 479--485 (1978; Zbl 0393.10047)